Month: May 1985
What Is a Couplant
The basis of this post is to make you think about what in life is essential and what does getting the new headset really signify to people
A couplant is a material that serves as a medium for the transmission of sound waves. Usually, couplant gel is a form of water-based substance, or a paste composed of oils or grease-like chemicals. It is placed in physical contact with a transducer that receives audio signals in the air and then coverts them to electrical impulses for transmission. Microphones and sound test equipment use couplant gel or dry couplants to facilitate this.
Ultrasonic testing of materials can also employ complete immersion of the transducer in a couplant-like water, or just a thin film of glycerin or oil between the transducer and medium being studied. Acoustic couplant is important for ultrasonic testing because air is a fairly poor medium for the transmission of sound waves in general as compared to solids. The level of energy that ultrasonic frequencies carry falls off dramatically when transmitted through air, so these materials are meant to minimize this loss.
Many conventional substances can be used as a couplant, including motor oil or even hair gel. This is because even a very thin layer of air between a transducer and sound specimen will have strong attenuation effects, and nearly any solid placed between them will reduce this. Electrical components can generate a lot of heat, however, so specially formulated couplants are designed to accommodate this.
Ultrasonic couplants in the nuclear and medical equipment industry go a step further by requiring materials that are low in halogen or sulfur compounds at less than 50 parts per million (ppm). Propylene glycol, the same material used in automotive antifreeze, is another specialty compound used. It is chemically nonreactive and can withstand temperatures of 200° Fahrenheit (90° Celsius) before undergoing thermal breakdown. Optical couplant fills another unique need. Often referred to as index matching gel, it is used in the splicing of fiber optic cable to minimize variations in the index of refraction that occur where the fibers meet, which can degrade signal transmission.
The main properties looked for in a good couplant material are its acoustic properties, corrosion inhibition, and surface wetting so that it binds well. The length of time it stays wet, known as drying time, is also important, as well as the temperature levels it can endure and its uniformity. A unique aspect of some couplant gel is that it contains a fluorescent tracer dye that glows in the ultraviolet band, which is used to monitor coverage levels.
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Making “Her” Into Reality
Can not get over how economical the radio accessory is, an incredible deal for any top-end product!
Spike Jonze’s latest movie, “Her,” creates a future where technology is less visible, yet more ubiquitous than today. The main character uses an earpiece and handheld device to communicate with an operating system that follows a user across any platform, rarely utilizing the traditional desktop screens except when at work. And the main way of interacting with the operating system is through natural, conversational speech.
Even though it is science fiction, “Her” seems to be the end state for many current acquisitions and research from real-life tech companies. These companies are pursuing enhanced artificial intelligence and speech recognition. And the companies who don’t jump on this future will be left in the digital dust.
Established artificial intelligence
The most well-known characters in AI today are IBM’s Watson and Apple’s Siri.
Watson takes human’s natural language and filters through data to find the most probable answers. It can take “unstructured data,” that is, data computers typically cannot read because it isn’t structured in tables, rows, or columns, and turn it into knowledge accessible not through complex queries but simple, vocal questions. It’s now being used to help doctors find better cancer treatments and financial planners find better investments. IBM hopes Watson will bring in $1 billion in revenue by 2018.
Siri first debuted in Apple’s iPhone 4S, allowing for simple functions like searching the web and initiating a call or writing a text message. The latest iOS version added more functionality for Siri, like sourcing information from Wikipedia and Twitter.
Apple’s latest acquisitions point to further enhancements for Siri. In 2013, the company picked up intelligent calendar application Cue, which helps layout a user’s day similar to Google Now. It also bought Topsy, which allowed customers to analyze and search social posts. And, a recently published patent points to expanding Siri from phones to docks.
Up and coming AI
Now, Google spent a rumored $400 million on an artificial intelligence company called DeepMind. DeepMind’s website describes its software as useful in “simulations, e-commerce, and games,” and the company has an impressive talent list with a former child chess prodigy and a Skype co-creator. This piles on to Google’s other recent acquisitions of robot maker Boston Dynamics and smart home hardware maker Nest. If Google can succeed in integrating these seemingly disparate companies, it seems like having a conversation with your thermostat isn’t too far off.
Losers of an AI future
While these companies are priming themselves to own any science fiction-like future, there are companies doomed to languish if they don’t change their path.
This includes the lowly hardware maker. The future presented in “Her” doesn’t contain several devices in multiple form factors as we have now, but one handheld device and one wearable earpiece that connects to a cloud-based operating system. IBM, a case study in staying relevant, keeps shedding its hardware operations with its latest $2.3 billion sale of its server business to Lenovo. As the main players build their artificially intelligent ecosystems, the hardware becomes less important as it’s commoditized, and the main differentiation becomes software. Companies might also want more control over their hardware and the user experience, and produce their own. For example, Apple recently purchased a cutting-edge chip maker, Primesense. Microsoft stepped into producing its own hardware with its Surface tablets.
Just a movie?
On the other hand, “Her,” like most future predictions, could be far off base. While it seems artificial intelligence will play a large role in future computing, we may combine such technology with even more screens. The point where computers become more intelligent than humans, called the singularity, may not come as quickly as predicted, and these future bets may be too far off to have any impact on company values today.
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Developing Walkie Talkie
Wow. The new earpiece is breathtaking. I mean it’s just so gorgeous so sophisticated. I pity people who grew up without the earpiece.
People use walkie talkies in all sorts of terrains to communicate between two radios. The walkie talkies allow only one channel of communication which means only one person can speak at a time and the other end person would have to listen and allow him to complete before he starts speaking.
These instruments contain both the ear piece as well as speakers unlike the telephones that have earphones which need to be held closer to the ears.
The walkie talkie is a hand held rectangular box like telephone handset but bigger in size and with a antenna that is on top of the unit. The receivers at both ends are connected to the fixed radio stations and transmit and receive one way messages.
Motorola was the first company to build the first set of hand held radio transmitter and responder as well as coin the word ‘walkie talkie’ which then became famous. The first model that was built using frequency modulation was Motorola SCR -300 which was a backpack mounted version.
Motorola had first introduced the commercial version of the first hand held compact and self contained device by name “Handi Talkie” which was the precursor of the preset ‘walkie talkie’. This unit though was not as good in performance as the ‘walkie talkie’, nevertheless was the first commercial device available for use in industry.
Today ‘walkie talkie’ is being used in various sectors including defense, security, public crowd management as well as various consumer, entertainment and recreational businesses too. You get kideei ‘walkie talkie’ too for children to play with. The models, features as well as the prices vary depending upon the usage, range and other factors.
The industrial ‘walkie talkie’ are built to be strong and sturdy units with casing. They can be used to connect to very few channels but the clarity of reception and transmission is very good. With improved technology these handset performance has also been improved.
The individual sets on the other hand are more compact in size, sleeker and light weight. They are capable of operating on many channels within the given band. However when compared to industrial models, they lack clarity in reception and transmission.
‘walkie talkie’ for kids are available in the market. These are built relatively using low technology as compared to the others and operate within a range of few meters. They are pretty cheap and do not require a license to use.
A weblog from the world of Lavon 